I use to change lancets MAYBE 1-2x/year, but my current lancing device is worn out (after I dropped it in a parking lot and it got run over), so now I'm changing every 1-2 weeks to use the last of my lancets so I can get a new device. I checked into just replacing the current one, but it's not made anymore, and the current lancets are not compatible with the new device that replaces it.

Yeah, I don't remember the last time I changed a lancet. Most of the lancets in my boxes at home have been used for extracting splinters after doing heavy-duty yard work.

However, I've noticed as I'm getting older I'm getting more sensitive to the "ouch" from a dull lancet and the resulting calluses are getting tougher to poke through, so I'm trying to remember to change at least once a week. Lord knows I have enough of them stockpiled!

I use a pump, but I always carry a syringe with me in case of emergency. I have about 30 stockpiled from way back when, and if I ever run out (could be years at this point) my endo would just hand me some samples to keep on hand. Just had to use one the other week when an infusion set went bad, but it was "fresh" so it went back in the emergency baggie (or as I call it, the Oh Cr*p Kit)

I change my lancets every week or two, when I notice them starting to get dull (if it takes me multiple attempts to draw blood, they are likely getting dull - or if they hurt). I test a lot (8 - 10x per day) so a week or two is actually a lot of testing.

I tried to always use fresh syringes. It was more important in the N & R days,when I mixed for each shot, because if you reused, you could contaminate the R with N. (The procedure was/is to always get the R first, then add N, because N is essentially R with added "delay" chemicals. A bit of R won't hurt N, but a bit of N contaminates R.) So, after years of that, it was a strong habit. Once on MDI, when I was tight for money, I'd reuse them maybe twice. But even then, I always feared accidentally using a used Lantus syringe for my Humalog, or visa versa, as the basal insulins are not supposed to be mixed with fast-actings.

As to lancets, when I first started testing, you had to use a new lancet each time, due to the way the device loaded. So it is possible to change every time. Granted, at that time a test took several minutes, so the extra few seconds to change the lancet was just part of the process. Now that tests only take a few seconds, and we test more often, changing the lancet takes longer than performing the actual test. I now change my lancet religiously every time I start a new can of strips (every 50 tests, or a bout once a week).